Scissor fork type telescopic mechanism of forklift

Abstract

The utility model discloses a fork type telescopic mechanism of a forklift, which comprises a first fork component, a second fork component, a third fork component and a fourth fork component, the second shear fork assembly comprises a second upper rotating unit and a second lower rotating unit; the scissor-type telescopic mechanism has an unfolded state and a contracted state, and in the contracted state, the minimum distance from the portal to the pallet fork is smaller than the sum of the width of the first upper rotating unit and the width of the second upper rotating unit and / or smaller than the sum of the width of the first lower rotating unit and the width of the second lower rotating unit. According to the forklift, the space occupied by the first shear fork assembly and the second shear fork assembly in the length direction is reduced, the distance between the pallet fork and the portal frame is shortened, the distance between the pallet fork and the gravity center of the forklift can be closer, the forklift is more stable in the running process, and the dangerous situation that the forklift inclines forwards is not prone to occurring.

Description

Technical Field

[0001] The utility model relates to the technical field of forklifts, in particular to a scissor-type telescopic mechanism of a forklift. Background Art

[0002] A forklift includes a fork for loading and unloading goods. When in use, the fork often needs to be moved forward and backward, so a telescopic mechanism that can drive the fork to move forward and backward needs to be provided on the forklift.

[0003] However, after the existing telescopic mechanism is retracted, its multiple telescopic arms still occupy too much space in the length direction, resulting in an excessive distance between the mast and the forks. As a result, the forks are farther away from the center of gravity of the vehicle when picking up goods and driving, making it unstable during driving and prone to dangers such as tipping forward. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to propose a scissor-type telescopic mechanism for a forklift, which is used to solve the problem that the telescopic mechanism in the prior art still has a large length after being retracted, causing the fork to easily tilt forward during driving.

[0005] The technical solution adopted by the utility model to solve the technical problem is a scissor-type telescopic mechanism of a forklift, which is arranged between a door frame and a fork, and the scissor-type telescopic mechanism comprises:

[0006] A first scissor assembly, comprising a first upper rotating unit and a first lower rotating unit, one end of the first upper rotating unit is hinged to the upper end of the door frame, one end of the first lower rotating unit is connected to the lower end of the door frame and can rotate and slide relative to the door frame, and the middle part of the first upper rotating unit is hinged to the middle part of the first lower rotating unit;

[0007] The second scissor-fork assembly comprises a second upper rotating unit and a second lower rotating unit, one end of the second upper rotating unit is hinged to the upper end of the fork, one end of the second lower rotating unit is connected to the lower end of the fork and can rotate and slide relative to the fork, the middle part of the second upper rotating unit is hinged to the middle part of the second lower rotating unit; one end of the second lower rotating unit away from the fork is hinged to one end of the first lower rotating unit away from the door frame, and one end of the second upper rotating unit away from the fork is hinged to one end of the first upper rotating unit away from the door frame;

[0008] The scissors-type telescopic mechanism has an expanded state and a retracted state, and the first scissors-type assembly and the second scissors-type assembly rotate relative to each other to enable the scissors-type telescopic mechanism to switch arbitrarily between the expanded state and the retracted state; in the retracted state, the minimum distance from the door frame to the fork is less than the sum of the widths of the first upper rotating unit and the second upper rotating unit, and / or less than the sum of the widths of the first lower rotating unit and the second lower rotating unit.

[0009] Further, the door frame includes a first frame body, and the first frame body includes two first side panels;

[0010] In the retracted state, the first upper rotating unit and the first lower rotating unit are partially or completely stored to the sides of the two first side plates.

[0011] Furthermore, in the retracted state, the first upper rotating unit and the first lower rotating unit are completely stored between the two first side plates.

[0012] Furthermore, a first sliding groove is provided on the inner side of the first side plate along the height direction, and one end of the first lower rotating unit can rotate and slide in the first sliding groove.

[0013] Furthermore, it also includes a driving oil cylinder, one end of which is hinged to the first frame, and the other end of which is hinged to the first upper rotating unit;

[0014] In the retracted state, the driving cylinder is located between the two first side plates, or on a side of the first frame away from the fork.

[0015] Furthermore, the cargo fork includes a second frame body, and the second frame body includes two second side plates;

[0016] In the retracted state, the second upper rotating unit and the second lower rotating unit are partially or completely stored to the sides of the two second side plates.

[0017] Furthermore, in the retracted state, the second upper rotating unit and the second lower rotating unit are completely stored between the two second side plates.

[0018] Furthermore, a second sliding groove is provided on the inner side of the second side plate, and one end of the second lower rotating unit can rotate and slide in the second sliding groove.

[0019] Further, the first upper rotating unit includes two first upper side plates, the first lower rotating unit includes two first lower side plates, the second upper rotating unit includes two second upper side plates, and the second lower rotating unit includes two second lower side plates;

[0020] In the contracted state, the first upper side plate is located inside the first lower side plate, the second upper side plate is located inside the second lower side plate, the first upper side plate is located inside the second upper side plate, and the first lower side plate is located inside the second lower side plate.

[0021] Further, in the contracted state, the first lower side plate abuts against the second upper side plate.

[0022] Compared with the prior art, the utility model has at least the following beneficial effects:

[0023] By partially or completely storing the first scissors-lift assembly inside the mast, and partially or completely storing the second scissors-lift assembly inside the fork, the minimum distance from the mast to the fork is made smaller than the sum of the widths of the first upper rotating unit and the second upper rotating unit, and / or smaller than the sum of the widths of the first lower rotating unit and the second lower rotating unit, so as to greatly reduce the space occupied by the first scissors-lift assembly and the second scissors-lift assembly in the length direction, shorten the distance between the fork and the mast, and thus make the fork closer to the center of gravity of the forklift, making the forklift more stable during driving and less prone to the dangerous situation of tipping forward. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the mast, fork and scissor-type telescopic mechanism in the unfolded state in the embodiment;

[0025] Figure 2 It is a schematic diagram of the structure of the first frame, the second frame and the scissor-type telescopic mechanism in the unfolded state in the embodiment;

[0026] Figure 3 It is a structural schematic diagram of the scissor-type telescopic mechanism in the unfolded state in the embodiment;

[0027] Figure 4 It is a schematic diagram of the structure of the mast, fork and scissor-type telescopic mechanism in the retracted state in the embodiment;

[0028] Figure 5 It is a schematic structural diagram of the first frame, the second frame and the scissor-type telescopic mechanism in the retracted state in the embodiment;

[0029] Figure 6 It is a structural schematic diagram of the scissor-type telescopic mechanism in the retracted state in the embodiment;

[0030] In the figure:

[0031] 100, scissor-type telescopic mechanism; 110, first upper rotating unit; 111, first upper side plate; 120, first lower rotating unit; 121, first lower side plate; 130, second upper rotating unit; 131, second upper side plate; 140, second lower rotating unit; 141, second lower side plate;

[0032] 200, door frame; 210, first frame body; 211, first side plate;

[0033] 300, cargo fork; 310, second frame; 311, second side plate;

[0034] 400. Driving cylinder. DETAILED DESCRIPTION

[0035] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0036] Please refer to Figure 1-Figure 6 The utility model discloses a scissor-type telescopic mechanism of a forklift, which is arranged between a door frame 200 and a fork 300. The scissor-type telescopic mechanism 100 includes:

[0037] A first scissor assembly, comprising a first upper rotating unit 110 and a first lower rotating unit 120, wherein one end of the first upper rotating unit 110 is hinged to the upper end of the door frame 200, one end of the first lower rotating unit 120 is connected to the lower end of the door frame 200 and can rotate and slide relative to the door frame 200, and the middle part of the first upper rotating unit 110 is hinged to the middle part of the first lower rotating unit 120;

[0038] The second scissor assembly comprises a second upper rotating unit 130 and a second lower rotating unit 140, wherein one end of the second upper rotating unit 130 is hinged to the upper end of the fork 300, one end of the second lower rotating unit 140 is connected to the lower end of the fork 300 and can rotate and slide relative to the fork 300, and the middle part of the second upper rotating unit 130 is hinged to the middle part of the second lower rotating unit 140; one end of the second lower rotating unit 140 away from the fork 300 is hinged to one end of the first lower rotating unit 120 away from the door frame 200, and one end of the second upper rotating unit 130 away from the fork 300 is hinged to one end of the first upper rotating unit 110 away from the door frame 200;

[0039] The scissor-type telescopic mechanism 100 has an expanded state and a retracted state, and the first scissor-type assembly and the second scissor-type assembly rotate relative to each other so that the scissor-type telescopic mechanism 100 can be switched between the expanded state and the retracted state at will; in the retracted state, the minimum distance from the door frame 200 to the fork 300 is less than the sum of the widths of the first upper rotating unit 110 and the second upper rotating unit 130, and / or less than the sum of the widths of the first lower rotating unit 120 and the second lower rotating unit 140.

[0040] Specifically, the fork 300 is driven to move forward and backward by the relative rotation of the first upper rotating unit 110 and the first lower rotating unit 120, the rotation of the second upper rotating unit 130 and the second lower rotating unit 140, and the relative rotation of the first scissor assembly and the second scissor assembly, so as to realize the forward and backward movement of the fork 300. In the retracted state, the first upper rotating unit 110 and the first lower rotating unit 120 are stacked together, and the second upper rotating unit 130 and the second lower rotating unit 140 are stacked together. At this time, the first upper rotating unit 110 and the second upper rotating unit 130 are arranged in the length direction, and the first lower rotating unit 120 and the second lower rotating unit 140 are also arranged in the length direction.

[0041] That is to say, even if the telescopic mechanism is retracted to the minimum, the minimum distance from the mast 200 to the fork 300 will always be greater than or equal to the sum of the widths of the first upper rotating unit 110 and the second upper rotating unit 130, and / or greater than or equal to the sum of the widths of the first lower rotating unit 120 and the second lower rotating unit 140. In the present application, by partially or completely storing the first scissor assembly inside the mast 200, and partially or completely storing the second scissor assembly inside the fork 300, the minimum distance from the mast 200 to the fork 300 is less than the sum of the widths of the first upper rotating unit 110 and the second upper rotating unit 130, and / or less than the sum of the widths of the first lower rotating unit 120 and the second lower rotating unit 140, so as to greatly reduce the space occupied by the first scissor assembly and the second scissor assembly in the length direction, shorten the distance between the fork 300 and the mast 200, and thus make the fork 300 closer to the center of gravity of the forklift, so that the forklift is more stable during driving and is less likely to tip forward.

[0042] Furthermore, the door frame 200 includes a first frame body 210, and the first frame body 210 includes two first side panels 211;

[0043] In the retracted state, the first upper rotating unit 110 and the first lower rotating unit 120 are partially or completely stored to the sides of the two first side plates 211 .

[0044] Furthermore, in the retracted state, the first upper rotating unit 110 and the first lower rotating unit 120 are completely stored between the two first side plates 211 .

[0045] Specifically, the first frame 210 includes two first side plates 211, and there is a receiving space between the two first side plates 211. The first upper rotating unit 110 and the first lower rotating unit 120 can be stored in the receiving space after shrinking to shorten the distance between the door frame 200 and the fork 300.

[0046] Furthermore, a first sliding groove is provided on the inner side of the first side plate 211 along the height direction, and one end of the first lower rotating unit 120 can rotate and slide in the first sliding groove.

[0047] Specifically, during the expansion process, one end of the first lower rotating unit 120 slides upward in the first sliding groove, and during the contraction process, one end of the first lower rotating unit 120 slides downward in the first sliding groove.

[0048] Furthermore, it also includes a driving cylinder 400, one end of which is hinged to the first frame 210, and the other end of which is hinged to the first upper rotating unit 110;

[0049] In the retracted state, the driving cylinder 400 is located between the two first side plates 211 , or on a side of the first frame 210 away from the fork 300 .

[0050] Specifically, in the retracted state, the driving cylinder 400 is stored between the two first side plates 211, or is located on the side of the first frame 210 away from the fork 300, so as to prevent the driving cylinder 400 from occupying the space between the first frame 210 and the second frame 310, thereby shortening the distance between the gantry 200 and the fork 300.

[0051] Furthermore, the fork 300 includes a second frame 310, and the second frame 310 includes two second side plates 311;

[0052] In the retracted state, the second upper rotating unit 130 and the second lower rotating unit 140 are partially or completely stored to the sides of the two second side plates 311 .

[0053] Furthermore, in the retracted state, the second upper rotating unit 130 and the second lower rotating unit 140 are completely stored between the two second side plates 311 .

[0054] Specifically, the second frame 310 includes two second side plates 311 , and there is a receiving space between the two second side plates 311 . The second upper rotating unit 130 and the second lower rotating unit 140 can be stored in the receiving space after shrinking to shorten the distance between the door frame 200 and the fork 300 .

[0055] Furthermore, a second sliding groove is opened on the inner side of the second side plate 311, and one end of the second lower rotating unit 140 can rotate and slide in the second sliding groove.

[0056] Specifically, during the expansion process, one end of the second lower rotating unit 140 slides upward in the second sliding groove, and during the contraction process, one end of the second lower rotating unit 140 slides downward in the second sliding groove.

[0057] Further, the first upper rotating unit 110 includes two first upper side plates 111, the first lower rotating unit 120 includes two first lower side plates 121, the second upper rotating unit 130 includes two second upper side plates 131, and the second lower rotating unit 140 includes two second lower side plates 141;

[0058] In the contracted state, the first upper side plate 111 is located on the inner side of the first lower side plate 121 , the second upper side plate 131 is located on the inner side of the second lower side plate 141 , the first upper side plate 111 is located on the inner side of the second upper side plate 131 , and the first lower side plate 121 is located on the inner side of the second lower side plate 141 .

[0059] Specifically, the first upper side plate 111 is located on the inner side of the first lower side plate 121, so that after contraction, the first upper side plate 111 and the first lower side plate 121 can overlap together, thereby reducing the space occupied by the first scissors assembly in the length direction; the second upper side plate 131 is located on the inner side of the second lower side plate 141, so that after contraction, the second upper side plate 131 and the second lower side plate 141 can overlap together, thereby reducing the space occupied by the second scissors assembly in the length direction; the first upper side plate 111 is located on the inner side of the second upper side plate 131, and the first lower side plate 121 is located on the inner side of the second lower side plate 141, so that after contraction, the first scissors assembly and the second scissors assembly can be staggered in the width direction to avoid mutual interference between the two during the contraction process, so that the first scissors assembly and the second scissors assembly can be stored to the minimum length, thereby also shortening the space occupied by the entire telescopic mechanism in the length direction and shortening the distance from the door frame 200 to the fork 300.

[0060] Furthermore, in the contracted state, the first lower side plate 121 abuts against the second upper side plate 131 .

[0061] In the retracted state, the first lower side plate 121 and the second upper side plate 131 are in contact with each other, that is, the first scissors-fork assembly and the second scissors-fork assembly have been retracted to the extreme position. At this time, the space occupied by the first scissors-fork assembly and the second scissors-fork assembly in the length direction is the smallest, and the distance from the door frame 200 to the fork 300 is the smallest.

[0062] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0063] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0064] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A scissor-type telescopic mechanism of a forklift, which is arranged between a mast and a fork, and is characterized in that: The scissor-type telescopic mechanism comprises: A first scissor assembly, comprising a first upper rotating unit and a first lower rotating unit, one end of the first upper rotating unit is hinged to the upper end of the door frame, one end of the first lower rotating unit is connected to the lower end of the door frame and can rotate and slide relative to the door frame, and the middle part of the first upper rotating unit is hinged to the middle part of the first lower rotating unit; The second scissor-fork assembly comprises a second upper rotating unit and a second lower rotating unit, one end of the second upper rotating unit is hinged to the upper end of the fork, one end of the second lower rotating unit is connected to the lower end of the fork and can rotate and slide relative to the fork, the middle part of the second upper rotating unit is hinged to the middle part of the second lower rotating unit; one end of the second lower rotating unit away from the fork is hinged to one end of the first lower rotating unit away from the door frame, and one end of the second upper rotating unit away from the fork is hinged to one end of the first upper rotating unit away from the door frame; The scissors-type telescopic mechanism has an expanded state and a retracted state, and the first scissors-type assembly and the second scissors-type assembly rotate relative to each other to enable the scissors-type telescopic mechanism to switch arbitrarily between the expanded state and the retracted state; in the retracted state, the minimum distance from the door frame to the fork is less than the sum of the widths of the first upper rotating unit and the second upper rotating unit, and / or less than the sum of the widths of the first lower rotating unit and the second lower rotating unit.

2. The scissor-type telescopic mechanism of a forklift according to claim 1, characterized in that: The door frame includes a first frame body, and the first frame body includes two first side panels; In the retracted state, the first upper rotating unit and the first lower rotating unit are partially or completely stored to the sides of the two first side plates.

3. The scissor-type telescopic mechanism of a forklift according to claim 2, characterized in that: In the retracted state, the first upper rotating unit and the first lower rotating unit are completely stored between the two first side plates.

4. The scissor-type telescopic mechanism of a forklift according to claim 2, characterized in that: A first sliding groove is provided on the inner side of the first side plate along the height direction, and one end of the first lower rotating unit can rotate and slide in the first sliding groove.

5. The scissor-type telescopic mechanism of a forklift according to claim 2, characterized in that: It also includes a driving oil cylinder, one end of which is hinged to the first frame, and the other end of which is hinged to the first upper rotating unit; In the retracted state, the driving cylinder is located between the two first side plates, or on a side of the first frame away from the fork.

6. The scissor-type telescopic mechanism of a forklift according to claim 1, characterized in that: The fork comprises a second frame body, and the second frame body comprises two second side plates; In the retracted state, the second upper rotating unit and the second lower rotating unit are partially or completely stored to the sides of the two second side plates.

7. The scissor-type telescopic mechanism of a forklift according to claim 6, characterized in that: In the retracted state, the second upper rotating unit and the second lower rotating unit are completely stored between the two second side plates.

8. The scissor-type telescopic mechanism of a forklift according to claim 6, characterized in that: A second sliding groove is provided on the inner side of the second side plate, and one end of the second lower rotating unit can rotate and slide in the second sliding groove.

9. The scissor-type telescopic mechanism of a forklift according to claim 1, characterized in that: The first upper rotating unit includes two first upper side plates, the first lower rotating unit includes two first lower side plates, the second upper rotating unit includes two second upper side plates, and the second lower rotating unit includes two second lower side plates; In the contracted state, the first upper side plate is located inside the first lower side plate, the second upper side plate is located inside the second lower side plate, the first upper side plate is located inside the second upper side plate, and the first lower side plate is located inside the second lower side plate.

10. The scissor-type telescopic mechanism of a forklift according to claim 9, characterized in that: In the contracted state, the first lower plate abuts against the second upper plate.

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